spirene

spirene
An unsaturated spiran containing at least one double bond in one of the rings

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  • spiran — noun Any of a class of bicyclic hydrocarbons in which a carbon atom has two single bonds in each of two rings; a form of spiro compound See Also: spirene, spiro …   Wiktionary

  • transpyrénéen — transpyrénéen, enne [ trɑ̃spireneɛ̃, ɛn ] adj. • 1842; de trans et pyrénéen ♦ Géogr. 1 ♦ Situé au delà des Pyrénées. 2 ♦ Qui traverse les Pyrénées. ● transpyrénéen, transpyrénéenne adjectif Qui est au delà des Pyrénées. Qui franchit les Pyrénées …   Encyclopédie Universelle

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